is this an automatic or standard? the idles is too low sounds like.

 

is it a light vibration or violent? my Honda always had a little vibration at idle. It just kinda happens...you could try to seafoam it (b12 makes a sea-foam equiv for 1/2 the price)

 

its a standard, my buddy just bought a 92 civic yesterday, its also standard, and his idles at about 800 but no vibration, its not a hard vibration, just a slight vibration, i think it may be the plug wires but they are a little pricey

 

check all of the hoses for cracks etc. a 170k mile old vaccume line could easily be cracked. that is if hondas have vac lines lol. im import illiterate

 

Of course they don't have vac lines...they don't need them, they have VTEC